Panamax MB850 Battery Backup Surge Protector

$419.95 OR

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Model: MB850 UPC: 050616008532 Item: 152683

Product Information

5 Battery Powered and Surge Protected OutletsProvides continuous battery backup when power is interrupted.

4 Fulltime Surge Protected OutletsProvides complete surge protection for equipment not requiring battery backup.

USB/Serial Port To PCAllows home theater PC to communicate with UPS through USB or serial port.

1 Pair, In/Out Coax / Cable Sat Surge Protection

Wiring Fault Indicator LightLED illuminates when wiring problems exist.

Ethernet Protection PortsPhone / Modem / DSL / Ethernet protection (Combination Ethernet or phone line protection).

Resettable Circuit BreakerProvides overload protection.

Auto-Shutdown SoftwarePanamax offers surge protection plus battery backup. The MB850 will safely shut down your home theater PC.

LCD Display Provides: Input Voltage Level Output Voltage Level AVR Status Meter Battery Capacity Estimated Runtime Load Level Output Power Frequencyinterrupted

Icon Indicators Includes: On Battery Mode Overload Condition Fault Condition

AVRAutomatic Voltage Regulation stabilizes input voltage to an appropriate level for optimal equipment performance by completely eliminating brownouts and overvoltages.


Weight 16 lbs.
Dimensions 4.375W x 10.25D x 8.875H

Output Power

MB850 850VA / 510 Watts with AVR

Output Voltage on Utility

Voltage 90V - 140V
Frequency 57 - 63 Hz
AVS Smart Boost Boost 10% of input voltage for output

Surge Protection

Surge Energy Capacity 890 Joules
Maximum Surge Current 36,000 Amps
Design Specification NSI/IEE C62.41 CAT A


Runtime Up to 120 minutes
Recharge 8 hours from total discharge
Normal Life 3 to 6 years
Battery Type Sealed maintenance free lead acid

Output Voltage on Battery

Voltage 120V 5V
Frequency 60Hz

Safety Approvals

UL UL 1778 (UPS)
FCC DoC Class B
cUL (Canada) cUL 107.1



We'd love to hear your thoughts! Please leave a review.

Customer Reviews for Panamax MB850 Battery Backup Surge Protector

4.5 / 5.0
2 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Rated 4 out of 5
Worked as advertised
May 6, 2020
Rated 5 out of 5
I really like the unit. It has plenty of plugs and is nice looking and compact. I havent needed the battery backup yet but seems like it will do the job. I love the feedback from the front display which shows voltage and you can scroll through other info like battery charge and how many minutes backup is available for the load that is currently being drawn. So far so good. I hope the battery holds up as many others haven't and the batteries seem to not last long and.have to be replaced. Time will tell. Happy for now.
May 16, 2018


Customer Q & A

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Can I use it for musical instruments?
A shopper on Apr 4, 2021
  Thanks for your inquiry. The Panamax MB850 will provide surge protection for up to 510 watts (combined connected devices). Note that estimated runtime on battery backup will vary based upon the total current draw (watts) of connected equipment.